| Abbreviation | Definition |
|---|---|
| HTE | Home Theatre Environment |
| HTEW | Home Theater Equipment Wanted |
| HTF | Home Theater Forum |
| HTIB | Home Theater In a Box |
| IBT | Indiana Ballet Theatre |
| IBT | International Ballet Theatre |
| IBT | International Ballet Theatre's |
| IBTD | International Bibliography of Theatre Dance |
| IETC | In Extremis Theater Company |
| IFOT | Idaho Falls Opera Theatre |
| IFT | Ipswich Film Theatre |
| IFTR | International Federation for Theater Research |
| IFTT | Ipswich Film Theatre Trust |
| IHT | Instant Home Theater |
| IMDT | Irish Modern Dance Theatre |
| IRT | Indiana Repertory Theatre |
| ITAT | Icelandic Take Away Theatre |
| ITDA | International Theatre Design Archive |
| ITEM | Integrated Theater Engagement Model |
| ITI | International Theatre Institute |